I just watched an old movie called "The Car" While the lead car is not a C body, all the cop cars in that film are Monaco's. One is an AMC product though.

If you are into building cop cars another famous one would be from a small town in Tn. The home of Buford Pusser used Monaco's for there city police cars. If you don't know who that is, he's a famous sheriff in that town known for cleaning up the town and carrying a very large stick to prove his point. They made three films about him called "Walking Tall". I know Joe Don Baker played Buford in two of those movies. Do a google search and check it out.